linux_statfs.h revision 1.1.16.1
1 /* $NetBSD: linux_statfs.h,v 1.1.16.1 2007/12/09 19:37:06 jmcneill Exp $ */ 2 3 /*- 4 * Copyright (c) 1995, 1998, 1999 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Frank van der Linden and Eric Haszlakiewicz; by Jason R. Thorpe 9 * of the Numerical Aerospace Simulation Facility, NASA Ames Research Center. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. All advertising materials mentioning features or use of this software 20 * must display the following acknowledgement: 21 * This product includes software developed by the NetBSD 22 * Foundation, Inc. and its contributors. 23 * 4. Neither the name of The NetBSD Foundation nor the names of its 24 * contributors may be used to endorse or promote products derived 25 * from this software without specific prior written permission. 26 * 27 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 28 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 29 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 30 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 31 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 32 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 33 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 34 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 35 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 36 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 37 * POSSIBILITY OF SUCH DAMAGE. 38 */ 39 40 #ifndef _LINUX_STATFS_H 41 #define _LINUX_STATFS_H 42 43 static void bsd_to_linux_statfs(const struct statvfs *, 44 struct linux_statfs *); 45 46 /* 47 * Convert NetBSD statvfs structure to Linux statfs structure. 48 * Linux doesn't have f_flag, and we can't set f_frsize due 49 * to glibc statvfs() bug (see below). 50 */ 51 static void 52 bsd_to_linux_statfs(bsp, lsp) 53 const struct statvfs *bsp; 54 struct linux_statfs *lsp; 55 { 56 int i; 57 58 for (i = 0; i < linux_fstypes_cnt; i++) { 59 if (strcmp(bsp->f_fstypename, linux_fstypes[i].bsd) == 0) { 60 lsp->l_ftype = linux_fstypes[i].linux; 61 break; 62 } 63 } 64 65 if (i == linux_fstypes_cnt) { 66 lsp->l_ftype = LINUX_DEFAULT_SUPER_MAGIC; 67 } 68 69 /* 70 * The sizes are expressed in number of blocks. The block 71 * size used for the size is f_frsize for POSIX-compliant 72 * statvfs. Linux statfs uses f_bsize as the block size 73 * (f_frsize used to not be available in Linux struct statfs). 74 * However, glibc 2.3.3 statvfs() wrapper fails to adjust the block 75 * counts for different f_frsize if f_frsize is provided by the kernel. 76 * POSIX conforming apps thus get wrong size if f_frsize 77 * is different to f_bsize. Thus, we just pretend we don't 78 * support f_frsize. 79 */ 80 81 lsp->l_fbsize = bsp->f_frsize; 82 lsp->l_ffrsize = 0; /* compat */ 83 lsp->l_fblocks = bsp->f_blocks; 84 lsp->l_fbfree = bsp->f_bfree; 85 lsp->l_fbavail = bsp->f_bavail; 86 lsp->l_ffiles = bsp->f_files; 87 lsp->l_fffree = bsp->f_ffree; 88 /* Linux sets the fsid to 0..., we don't */ 89 lsp->l_ffsid.val[0] = bsp->f_fsidx.__fsid_val[0]; 90 lsp->l_ffsid.val[1] = bsp->f_fsidx.__fsid_val[1]; 91 lsp->l_fnamelen = bsp->f_namemax; 92 (void)memset(lsp->l_fspare, 0, sizeof(lsp->l_fspare)); 93 } 94 95 #endif /* !_LINUX_STATFS_H */ 96
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